(x-10)*x=9000

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Solution for (x-10)*x=9000 equation:


Simplifying
(x + -10) * x = 9000

Reorder the terms:
(-10 + x) * x = 9000

Reorder the terms for easier multiplication:
x(-10 + x) = 9000
(-10 * x + x * x) = 9000
(-10x + x2) = 9000

Solving
-10x + x2 = 9000

Solving for variable 'x'.

Reorder the terms:
-9000 + -10x + x2 = 9000 + -9000

Combine like terms: 9000 + -9000 = 0
-9000 + -10x + x2 = 0

Factor a trinomial.
(-90 + -1x)(100 + -1x) = 0

Subproblem 1

Set the factor '(-90 + -1x)' equal to zero and attempt to solve: Simplifying -90 + -1x = 0 Solving -90 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '90' to each side of the equation. -90 + 90 + -1x = 0 + 90 Combine like terms: -90 + 90 = 0 0 + -1x = 0 + 90 -1x = 0 + 90 Combine like terms: 0 + 90 = 90 -1x = 90 Divide each side by '-1'. x = -90 Simplifying x = -90

Subproblem 2

Set the factor '(100 + -1x)' equal to zero and attempt to solve: Simplifying 100 + -1x = 0 Solving 100 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-100' to each side of the equation. 100 + -100 + -1x = 0 + -100 Combine like terms: 100 + -100 = 0 0 + -1x = 0 + -100 -1x = 0 + -100 Combine like terms: 0 + -100 = -100 -1x = -100 Divide each side by '-1'. x = 100 Simplifying x = 100

Solution

x = {-90, 100}

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